The Oxidized LDL test measures the level of oxidized low-density lipoprotein (LDL) cholesterol in your blood, which is considered a key factor in the development of atherosclerosis (hardening of the arteries). Elevated oxidized LDL levels can indicate increased cardiovascular risk. This test is particularly valuable for individuals with risk factors for heart disease, as it helps to provide a clearer picture of your cardiovascular health and informs strategies for prevention and treatment.